The Effect of Errors of the Form and Position of the Base Surfaces of a Composite Axisymmetric Body on the Size of an Adjacent Contour

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The influence of errors of form (ovalities) of the base surfaces of a composite axisymmetric body on the size of an adjacent contour was studied. It was proved that ovalities of all bourrelets of a composite axisymmetric body do not render an effect on the accuracy of measurement of the size of entry of this case, although they do affect the entrysize. Errors of the placement of joined tubes of the composite axisymmetric body in the form of displacements or misalignments of axes cause measurement errors of the entry size of the casings that are proportional to the ratio of the distances from the basic prisms to the end faces of tubes vs. the length of the tubes.